OP491GSZ

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The OP491GSZ instrumentation amplifier is a high performance, low cost version of a commonly used analog integrated circuit. It is a precise, linear, low noise differential to single-ended signal conditioner ideal for a wide range of applications. Its precision architecture and small package size make it ideal for low-power, portable applications. It is also compatible with both low-pass and high-pass filters, allowing for flexibility in signal conditioning.

The OP491GSZ is a three-op amp instrumentation amplifier that is commonly used to amplify small or large differential voltages. One of the most distinguishing features of this device is its ability to reject common mode voltages up to 100V. It can be used to provide both high-impedance and low-impedance gain and offers a gain of 10 with an additional 100kΩ feedback resistor. The device also contains a slew rate limiting feature which helps reduce the effect of large input signal transients.

The internal topology of the OP491GSZ consists of three operational amplifiers (op-amps), two of which function as input buffers and one as the gain stage. This design creates a differential output signal with common mode rejection. The two input buffers are connected to the non-inverting terminal of the two op-amps and the output is taken from the inverting terminal of the gain stage. A common mode voltage equal to the supply voltage can be applied across the inputs of the instrumentation amplifier, while the differential output voltage is unaffected.

The OP491GSZ is suitable for use in applications such as data acquisition systems, amplifiers, active filters and waveform generators, where it can be used to amplify signals from a wide range of sources. It can also be used in medical diagnostics, automation and control systems. Its high common mode rejection and precision architecture make it ideal for a wide range of industrial and consumer applications.

The OP491GSZ offers excellent performance in a small package size and is especially well-suited for use in portable instruments, where the device can provide low-cost and low-power operation. Its high common mode rejection makes it ideal for sensing differential signals over a wide range of voltages, while its slew rate limiting feature ensures robust performance in applications where large input signal transients could otherwise cause significant distortion to the output.

Overall, with its low cost, high performance and small package size, the OP491GSZ is a great choice for a wide range of instrumentation applications, such as precision signal conditioning, amplifying differentiating signals and filtering signals, making it a must-have analog integrated circuit.

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